Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

S. Hirai, Y. Kamihara, A. Wakatsuki, M. Matoba, W. L. Mao

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5 GPa. Since pressure suppresses the initial ferromagnetic ordering of Ce3+, our observation suggests a quantum critical point for CeRuPO near this pressure. The collapsed tetragonal phase transforms into an orthorhombic Cmma structure. This phase is isostructural with the low temperature phase of LaFeAsO, which is superconducting under high pressure. Since CeRuPO exhibits a similar relationship between the two phases of LaFeAsO, the collapsed tetragonal and orthorhombic phases of CeRuPO may adopt a novel magnetic ground state.

Original languageEnglish
Article number051917
JournalApplied Physics Letters
Issue number5
Publication statusPublished - 2013 Feb 4

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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